#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
	int m = 0;
	int n = 0;
	int i = 0;
	while (scanf("%d", &m) == 1)
	{
		n = m * (m - 1) + 1;
		for (i = 1; i <= m; i++)
		{
			printf("%d", n);
			n += 2;
			if (i != m)
			{
				printf("+");
			}
		}
		printf("\n");
	}
	return 0;
}